/* ==================== CSS FILE (styles.css) ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 15px 0;
    display: block;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: #667eea;
}

/* Page Styles */
.page {
    display: none;
    min-height: 100vh;
    padding-top: 100px;
    animation: fadeIn 0.5s ease-in-out;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Styles */
.gadget-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.gadget-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.gadget-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f0f2f5, #e1e8ed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #667eea;
    position: relative;
    overflow: hidden;
}

.gadget-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.gadget-card:hover .gadget-image::after {
    left: 100%;
}

.gadget-content {
    padding: 20px;
}

.gadget-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.gadget-description {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.gadget-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 10px;
}

.gadget-rating {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 15px;
}

.stars {
    color: #ffc107;
}

.btn {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: white;
    border-radius: 20px;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: scale(0.8) translateY(50px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #666;
    z-index: 1;
}

.modal-close:hover {
    color: #333;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

/* Special Features */
.special-banner {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 60px 30px;
    border-radius: 20px;
    text-align: center;
    margin: 30px 0;
    position: relative;
    overflow: hidden;
}

.special-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.special-content {
    position: relative;
    z-index: 1;
}

/* News Styles */
.news-item {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.news-date {
    color: #888;
    font-size: 0.8rem;
    margin-bottom: 5px;
}

.news-title {
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

/* Contact Form */
.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 15px;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 20px;
        max-width: calc(100% - 40px);
    }
}

/* File Structure Display */
.file-structure {
    background: #2d3748;
    color: #e2e8f0;
    padding: 30px;
    border-radius: 15px;
    font-family: 'Courier New', monospace;
    margin: 30px 0;
    overflow-x: auto;
}

.file-structure h3 {
    color: #81e6d9;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.file-tree {
    line-height: 1.8;
}

.file-tree .folder {
    color: #81e6d9;
    font-weight: bold;
}

.file-tree .file {
    color: #fbb6ce;
}

.file-tree .description {
    color: #a0aec0;
    font-style: italic;
}